Attack of the Prehistoric Pokémon Our heroes approach Grampa Canyon, famous for the beautiful scenery of its valley. As they approach, however, they find wave upon wave of people also heading for Grampa Canyon. Carrying backpacks, pickaxes, etc. they are all dressed like explorers. Ash has no idea what is so special about the canyon, but he notices a familiar face among the crowd—that of his rival, Gary. According to Gary, fossils from an extinct Pokémon have been discovered, triggering an ancient Pokémon excavation boom.